Relief mechanism for water-motors.



G. SUNDBY. RELIEF MECHANISM FOR WATER MOTORS.

APPLICATION FILED DEC. 23, 1912.

1,109,153, Patented Sept. 1,1914.

3 SHEETSSHEBT 1.

4 -.1- I G'W 111 Kn N LTERS O0. PHOTWLITHQ. WASHINGTON. n r:

G. SUNDBY.

RELIEFMEGHAN-ISM FOR WATER MOTORS.

APPLIGATION FILED DBO. 23, 1912.

1, 09,153, Patented Sept. 1, 1914.

3 SHEETS-SHEET 2'.

Fig.2.

"H5 KORRIS PA: ...e. nu-Luna WASHINGTON. D c.

G. SUNDBY. RELIEF MECHANISM FOR WATER MOTORS. APPLICATION PILEDDEG. 23, 1912.

1,109,153. Patented Sept. 1, 1914.

3 SHEETS-SHEET 3.

Fig.5.

T I-|E KORRIS PEIERS m7 FHOTU-LITHQ. WASHINGYDN. D. C.

' eUnMuNn sunnntr, F eLosHAUGEN, NEAR rnonnngrn yrj vonwni To all whom it may) concern Be it known that 1,. GUDMUND SUNDBY,

. a subject of theKing of Norway, residing at Gloshaugen, near Trondhj em, Norway, have invented certain new and useful Improvements in Relief Mechanism for Water-Motors; and I do hereby declare the followingtoEbe a full, clear, andexact description ofthe invention, such aswill enable others: skilled inthe art to which it appertains tov make and use the same, reference being-had to the accompanying drawings, and to:let-- ters or figures of reference marked thereon, which form a part of this specification.

. The, present invention relates to relief mechanism for. water motors and has for its object to. regulate the pressure and velocity of the water to prevent the water adIl'llSSlOIl. device of the water motor from being moved too fast, and thereby;,,causing. an excessive variation of pressure in the water-:pipe'if the movement of; the relief valve, for any reason, should not correspond to the-move ment of thewater admission device.

In known systems, the tachometer controls the servo-moter for the water admission device of the power engine, and the movement of the relief valve is controlled from the-admission device through an inserted cataract. Should the cataract fail, the relief valve will notbe opened when the water.

admission. device isclosed. Increased safety has been sought by introducing a second cataract, the motion of which. is dependent onthe relief valve and whichwill prolong the duration of the closing, if the relief valve should not open. Such a-system, however, is complicated and difficult to adjust and consequently uncertain.

According to the present 'nvention, positive operation is obtained by the action, of the governor elfectingthe movement of the relief valve which movement controls the admission of water. to thepower engine in" such manner, that th'e period of regulation ,.will beprolonged if-the relief valve'does' not move as quickly as it should.

The admission of waterto the power en vgine may be controlled by'anypart,-adapted therefor, of the motive mechanism of the relief valve, if care be taken, that the neces sary dependencyof the motion of the relief valve is present. 1 I

An embodiment of the invention isillus trated in the accompanying drawings in which-Figurel isa vertical.sectionthrough Specification of Letters Patent,

R LIEF MECHANISM non vv rrnn 0Tons.

. Application filed. December 23, 1912. serial1%. 73a275.

a portion ofthe regulating mechanism. Fig. 2is a side view of the same, and Fig. 3 isan elevation partly insection of the regulating mechanism connected to the water ad mis 'slon'devicej; a .1:

In-the embodiment illustrated, the I uter admission de'vice A (Fig. 3) of the power engine, not shown, is provided with a relief valve 0, which' s so connected by a rod 2 to apiston .1,-'-(-Fig. 1') of the regulating device B ,that the valve will be opened when the p1StOI1 1S raised and closed when the piston.

is lowered. v The -piston -l'works ina cylinder of. theregulating device and'ihas a rod 3' which extends through the cylinder head 4 and carries, arvpiston .Tcontained within" a Patented se a 1,1914.

"cataractcylinder' 6 which is slidablymounfl ed ona cylindricalextension of the head 4.

Oil under pressure is supplied from' apres sure tank, not shown, through a pipe 8 to theunderside of the piston? of the cataract. The loweriportion of the cylinder 6 com? HlUIllCEttBS-Wltll the upper: portion througl't a small passage 9:11 111 the piston and the upper.

portion of saidcylinder is vented under cer-' tain conditions through a longitudinal passage 11, and an annular passage 21 in the rod ;3 passage 22 in the cylinder head 1, which latterpassage connects withan outlet 10 in the casing ofvalve12. When the valve 12 is in the middleipositionthe outlet 10 will beopensnfiiciently to allow the quan-' 'tity of oillthat leaks through the-passage .9

to flow out and make the pressurexon the upper slde of the piston 7 exactly balance. the" pressure on gthe undersideso that i the:

1cataract williremain at rest. I The'lvalvefl2 can only open the outlet .10 whengtherelief valve a is"; closed and the piston' lfi's in its lowest. posltlon. As csoon as the pistonal is raised,. the connecting passage 22 is closed.

byg the rod 3. The cataract cylinder 6 is connected by 'a link 13 to-alever 15 fixed on a rock shaft 14: on which is fixed a short arm ,16 that is connected by a rod 17 to a "two .armed lever 18, one arm of which 15,6011- nected with the valve 12 and the other, arm

connected withfa centrifugal governor 19 of (the poWerae-ngine. Onthe shaft 14: is Efixed a third lever; 23 which through links-:and levers, {is connected to the regulating slide {of servo-motor 2d for regulating the ad-i mission} of water to the power 1 engine f through thewater admission device The mechanism"abovedescribedoperates as. followstwhen the. parts are the-fp0-.

- of the engine will raise'theend of" the lever sition shown, the relief valve a is closed, and the valve 12 1s 1n positlon to permit sufficient liquidt'opass from the upper side of the piston 7 to balance the cataract. If now the load on the power engine is suddenly diminished, thespeed of the engine will" increase andt'he centrifugal governor 18 connected to it and depress the other end of said lever;. The: rockinglofthe lever moves the valve 12downward, from: the position l shown, closing the outlet 10- and" opening the pressure inlet 20 1n the valve casing 0 so that pressure fluid. can 'flow througlrpas'sage 20. to theunderside of the piston l and cause-the latter to: moveupwardand open the relief valve (a- The cataract cylinder 6 will be moved upward,

simultaneously by the rod 3, raising-the lever 151 which Wlll IOClI the'shaft' ll and? through the medium of arm 16 and rod 17 raise;v that end of lever 18- which is connected to the valve 12 and return: thenlat't'er to its middle position; The rocking-of the shaft 14 will through the medium of the thirdlever 2.3 and itslinkand lever connections operate the servo-motor 2-1 so as to cause: the latter to closewthe admission of water to; the engine. The pressure liquid; supplied by the pipe 8 willnow-leak through the passage9 to the upper side of thenpiston 7' and ;as the operative 1 area of said piston is larger on the upper side than onthe lower 15,18, the'valve 12 is raised; pressure to the upper sideoff the piston l sorthat the latter will move downward and slowly closethe relief valve" aly The cataract will follow the downward movement of the rod l3' and move the valve 12 downward again: This operation will continue until the; relief: valve is entirely closed. The

valve 12 will. then remain in itsmiddl'e'positions and the cataract come to' rest. *The movement of the relief valve bechanged: by altering the size of" the passage .9; If the loadon the engine-is increased, the operation will lie-reversed, if the safety v'alveis not closedi The governor will cause 1 downward and the the piston 1' to move servo motor operated to open the water ad'- ;I1'llSSlOII-ClGVlCQa If the'rel'ief valve is closed the valve 12, onmoving upward,"will"ad- PlS- ton: 1,. but the latter cannot move farther downward: and, will remain at resti- 'More over,- the valve l2will openthe outlet from mitipressure to the upper side of the the upper side of the piston"? and the" cata-' ra'ct will move downward and operate thedevice for, admitting water to the engine in aa corresponding manner to that 'above 'described'so that said-device will'be opened-J Should'the relief valve not open if the load on the engine X is" suddenly diminished, the

I side, the cataract will 'move slowly upward: and: by. means of thedevers admitting" admission of water to the engine cannot be closed more quickly than the cataract moves upward, and this speed may be regulated completely with the size of the passage 9.

Should this passage 9 become choked, the relief valve will remain open, but there is no risk that either the latter or the water admission device will be closed too quickly.

Thus a regulating arrangement is provided,

which cannot cause too great an increase of pressure in the pipe; at any rate this cannot occur except bvaccid'ent, such formstance by the breaking of rods or-the lil re.

Ielaimg I, In a rellef mechanism for water motors, the combination with a water admis sion: device having a servo-motor and relief valve, of means operated by the gov- Iernor of the motor for actuating the relief valve, and means operated by the valve ac tuating means for operating the servo-mo tor. 7

I 2 In a relief mechanism'for water motors, the combmation with-a water admission device having a servo-motor anda repressure medium to the;powercylinder,and a cataractconnected with said piston and servounotor to control the admission of a pressure medium to the latter.'

i 4; In a relief mechanism for watergmo-* tors, the combination with a-water admis sion device having aservo motor, and a relief valve, of a power cylinder, a piston therein connected wlth the IGllGf valve and controlled by liquid pressure, a cataractcon- 'nected withthe piston, a controlling member' for the servo motor, operating means connectingthe cataract and member, a lever connected with said operat-- ,ing' means and the governor motor,and'means operated by'said'lever for regulating the supply ofpressure liquid tocontrolling of' the water said power cylinder.

- 5; In arelief mechanism for water mo-' tore, the combination with a water admission devicehaving a servo motor and a re-" llef' valve, of" a there n havlng a power cylinder, a, piston lief"va'lve',- a valve for controlling the admission of a pressure" fluid to the cylinder for. reciprocating the piston, a cataract compower cylinder, and

power cylinder, a piston rod connected to: the remission of pressure fluid to the power cylinder.

6. In a relief mechanism for water 1110- tors, the combination with a water admis- S1011 device having a servo-motor and a relie'l valve, oi a power cylinder, a piston therein having a rod connected to the relief valve, a valve for controlling the admission of a pressure fluid to the cylinder for reciprocating the piston, a cataract comprising an auxiliary piston on said rod, a cylinder containing the auxiliary piston and having a pressure fluid inlet on one side of the latter, an outlet channel from the other side of said auxiliary piston, means to close said channel simultaneously with the admission of pressure fluid to the power cylinder, and means actuated by the cataract to control the admission of a pressure fluid to th servo motor. I a

In testimony that I claim the foregoing as my invention, I have signed my name 1n presence of two subscriblng witnesses.

GUDMUND SUNDBY.

Witnesses s ANTON MEYER, CARL BASPI.

Copies of this patentmay be obtained for five cents each, by addressing the Commissioner of I'atents,

Washington, 10. 

